BW
Ilford Ortho Plus
Orthochromatic film sensitive to blue and green only. Can be handled under red safelight. Reds and oranges render dark.
ISO
80
Formats
4
35mm, 120, 4x5, 8x10
Process
BW
Type
B&W
Characteristics
Grainfine
Contrastmedium high
Latitudegood
Reciprocity Failure
Compensation Formula
t' = t1.25
Ilford official Factor P = 1.25. Rate at ISO 40 under tungsten lighting.
Often Used For
portraitsfoliagedarkroom handling
Help improve this page. Some information for this film is limited. If you have experience shooting Ortho Plus or know of published data we're missing, we'd love to hear from you.
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Last verified: Jan 2026Report an error